Can’t get

Our internal LDAP server has changed so I need to use the wpdirauth_filterquery filter in order to properly validate user logins. I was using the solution in this prior support thread however I cannot get wpdirauth_filterquery to fire.

I’ve tried modifying my functions.php (I am using TwentyThirteen as my theme) as well as a dedicated plugin. The only thing I’ve been able to get to work is to modify the plugin code itself. For obvious reasons I don’t really want to do that. My preference would be to write a simple plugin so I don’t have to worry about a theme update modifying functions.php either.

This is what I added to my functions.php:

function mgcAdjustDirAuthFilter($strCurrentFilter,$strFilter,$strUsername)
{
     error_log(sprintf("%s::%s\n", basename(__FILE__), __LINE__), 3, "/var/tmp/log.txt"); 
     return "(&(objectClass=user)(objectCategory=person)($strFilter=$strUsername))";
}
add_filter(‘wpdirauth_filterquery’,’mgcAdjustDirAuthFilter’,1,3);

But it never runs. I added error_log() statements within the function to trace execution but the text never appears and the filter is unchanged from the default after apply_filters runs from line 393 of wpDirAuth.php:

$filterQuery = apply_filters('wpdirauth_filterquery',$filterQuery,$filter,$username);

Since that didn’t work I tried creating simple plugin:

<?php
/**
 * @package MGC-wpDirAuth
 * @version 1.0
 */
/*
Plugin Name: MGC-wpDirAuth
Plugin URI: http://ww.wp.xz.cn/extend/plugins/tbd/
Description: This plugin defines a filter for the wpDirAuth plugin which configures the querty to work with Mentor's LDAP configuration.
Author: Mike Walsh
Version: 1.0
Author URI: http://michaelwalsh.org/
*/

function mgc_AdjustDirAuthFilter($strCurrentFilter,$strFilter,$strUsername)
{
    error_log(sprintf("%s::%s\n", basename(__FILE__), __LINE__), 3, "/var/tmp/log.txt");
    return "(&(objectClass=user)(objectCategory=person)($strFilter=$strUsername))";
}

// Setup the wpdirauth_filterquery hook
function mgc_wpDirAuth_init() {
    error_log(sprintf("%s::%s\n", basename(__FILE__), __LINE__), 3, "/var/tmp/log.txt");
    add_filter(‘wpdirauth_filterquery’,’mgc_AdjustDirAuthFilter’,1,3);
}

add_action( 'init', 'mgc_wpDirAuth_init' );
?>

Like the addition to functions.php, the filter never runs. The ‘init’ action does fire and I see the entry in the error log file. I’ve tried various priorities and other hooks (e.g. plugins_loaded and a couple others) but it didn’t make a difference. The site this is running only has one other plugin running which does nothing more than look up information from our LDAP server.

I assume I am missing something obvious I simply can’t see from staring at it.